Omega electronic caliber 1260

Omega Caliber 1260

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Omega electronic caliber 1260

Brand Omega
Caliber Number 1260
Base Caliber ESA 9164
Movement Type Electronic
Tuning Fork Frequency 300 Hz
Functions Day and date
Country of Manufacture Switzerland
Known Models SBGM031

Omega caliber 1260 tuning fork movement from an Electronic F300 Hz wristwatch. Designed by Max Hetzel, this movement began production in 1972.

Although this tuning fork movement was designated by Omega as a caliber 1260, the base movement is an ESA (Ebauches S.A) 9164 found in several other watches from Baume et Mercier, Eterna, Longines, Tissot, etc.

The ESA 9164 features a day and date. Caliber ESA 9162 (Omega caliber 1250) has a date only.

This particular watch was experiencing the dreaded spinning second hand issue when adjusting the time (you can watch a video of it here, and learn more about why that happens here).

The Accutron, an electromechanical watch developed by Max Hetzel and manufactured by Bulova beginning in 1960, used a 360 hertz steel tuning fork powered by a battery as its timekeeping element. The fork allowed it to achieve greater accuracy than conventional balance wheel watches. The humming sound of the tuning fork could be heard when the watch was held to the ear. –wikipedia

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